US9458026B2ActiveUtilityPatentIndex 49

Method for improving coercive force of epsilon-type iron oxide, and epsilon-type iron oxide

Assignee: OHKOSHI SHIN-ICHIPriority: Sep 30, 2009Filed: Sep 30, 2010Granted: Oct 4, 2016

Est. expirySep 30, 2029(~3.2 yrs left)· nominal 20-yr term from priority

Inventors:OHKOSHI SHIN-ICHI SAKURAI SHUNSUKE NAMAI ASUKA UMEDA SAYAKA HACHIYA HIROSHI MATSUMOTO KAZUYUKI GOTOH TAKASHI

C04B 2235/3217C01G 49/06H01F 1/10C01G 49/0018C04B 35/62826C04B 2235/761C04B 35/26C01P 2002/50C04B 2235/3418C01P 2002/52C04B 2235/3286C04B 2235/3289C01P 2006/42H01F 1/047

PatentIndex Score

Cited by

References

Claims

Abstract

To provide a method for improving a coercive force of epsilon-type iron oxide particles, and an epsilon-type iron oxide. Specifically, to provide a method for improving the coercive force of an epsilon-type iron oxide comprising: substituting Fe-site of the epsilon-type iron oxide with other element, while not substituting Fe of D-site in the epsilon-type iron oxide with other element, and the epsilon type iron oxide.

Claims

exact text as granted — not AI-modified

The invention claimed is: 
     
       1. A method for improving a coercive force of epsilon-type iron oxide, comprising:
 substituting Fe of a Fe-site of the epsilon-type iron oxide with a platinum group element, while not substituting Fe of D-site in the epsilon-type iron oxide with the platinum group element. 
 
     
     
       2. The method for improving the coercive force of epsilon-type iron oxide according to  claim 1 , wherein Fe of A-site in the epsilon-type iron oxide is not substituted with the platinum group element. 
     
     
       3. The method for improving the coercive force of the epsilon-type iron oxide according to  claim 1 , wherein the platinum group element is rhodium. 
     
     
       4. The method for improving the coercive force of the epsilon-type iron oxide according to  claim 2 , wherein the platinum group element is rhodium.

Cited by (0)

No later patents cite this yet.

References (0)

No backward citations on record.